Bathtub



FIG. 1 is a perspective view taken from the top, front and right side of a bathtub showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the rear being the same as the front shown;

FIG. 4 is a right side elevational view thereof, the left side being a mirror image of the right side shown;

FIG. 5 is a perspective view taken from the bottom, rear and left side thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for bathtub, as shown and described. 